How can i make a passworded content locker

Hi guys i would like to know how i can make a passworded content locker (a content locker that i would create myself not one linked to any other affiliate website company )so that visitors to my site would only be able to access the content when they put in a particular unique password that i give them ?

Note that adblockers might block our captcha, and other functionality on BHW so if you don't see the captcha or see reduced functionality please disable adblockers to ensure full functionality, note we only allow relevant management verified ads on BHW.